{"id":"S85110751","label":"Radioisotopes in petroleum engineering","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85110751","normalized_label":"radioisotopes in petroleum engineering","broader":["http://id.loc.gov/authorities/subjects/sh85100427"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85110751","provider":"lcsh","revision":"1fdc84e4d65a5462","taxonomy_revision":"f050b5d4780b1289","title":"Radioisotopes in petroleum engineering","url":"/topics/S85110751","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"903191903569593924","address_version":"morton4x16-v1","coordinates":[0,20,19135,31744],"answer_status":"Directory metadata; local answer requires separate source review","truth_status":"Subject descriptor, not a factual answer or a demonstrated knowledge gap","reviewed_answer":null}